In the indoor cool light, increase light softness, supplementary interior red intensity. The original ordinary microscope can't perspective card can be clearly seen.

Attack can be: I ran in indoor light, fluorescent light has a unique perspective on indoor cool light, increase light and coffee, supplementary interior red light intensity.

Objective To investigate the clinical efficacy of photodynamic therapy using low concentration of photosensitizer, short incubation time and red light source in the treatment of acne.